Centrifugal pump



Patented Jan.

FIGURE MT RN Y UNITED STATES PATENT OFFICE.

PONTUS OSTENBEBG, OF SAN JOSE, CALIFORNIA.

CENTRIFUGAL PUMP.

Application filed January 23, 1920.

To all whom it may concern:

Be it known that I, PONTUS OSTENBERG,

"a citizen of the United States, and resident of San Jose, in the county of Santa Clara and State of California, have invented certain new and useful Improvements in Centrifugal Pumps, of which the following is a specification. Y

My invention relates particularly to pump bowls, and it is the object of my invention to provide a bowl that will be more efficient in its practical application than other bowls for the type of pum herein set forth, and that will be more easi y and accurately assembled and manufactured than known bowls. It is also an object of my invention to provide a pump of the character hereinafter more particularly described in which the pump structure is simple in form and construction and highly eflicient in its practical ap plication.

In the drawing g Figure 1 is a verticalcross section through a pump embodying my invention. Flg. 2 is a sectional viewion line 2-2 of Fig. 1'.

Fig. 3 is a detail sectional view of a bowl embodying another form of my invention. Fig. 4: is a detail sectional view of a bowl embodying still another form of my invention.

Referring more particularl to the drawing, 1 indicates a drivingsha t and 2 a mam bearing bowl'provided with webs 3 supporting bearing 4. The bowl 2 is threaded at 1ts upper end to engage discharge casing section 5 and externally threaded at its lower end to engage a bowl 6. Bowl 2 is also provided with diffusion vanes as 7.

Bowl 6 consists of an upwardly extending cylindrical wall 7 interiorly threaded as at 8, an inwardly extending bottom plate 9 provided with an'opening 10, and a downwardly extending flange 11 exteriorly threaded as at 12, the flange 11 being only wide enough to permit the pro er threading thereof, and the upper wall being sufliciently wide to permit the necessary threading and to inclose the required diffusion VULHQS.

Specification of Letters Patent.

Patented Jan. 25, 1921.

Serial No. 353,565.

ing 10.

The form of runner used in this type of bowl comprises a tubular portion 15 secured to shaft 1 and carrying an annular flange 16 supporting a plurality of depending vanes 17 connected at their lower ends by ring 18, the diameter of the inner perimeter of said ring being substantially equal to the diameter of the opening 10 and the diameter of the outer perimeter of the said ring 18 and flange 16 being substantially equal to the distance between oppositely positioned vanes 13.

The bottom bowl 19 is constructed substantially the same as bowl 6 as to parts 7-8- 9-10 and 13 but has attached thereto a pipe section 19 supporting a'bearing 20 by means of webs 21. f

It is evident that this type of bowl is exceptionally simple and easy to manufacture as no cores arerequired in casting, smooth castings may be obtained with a minimum amount of work, and such machine work as maybe required is easilydone.

Une of the greatest advantages secured by this type of bowl is the accuracy with which the several bowls may be assembled. Ordinarily the bottom edges of the vanes 14 of the several bowls vary greatly in their distance from the adjacent runner flange 16,

cated at 22 maybe placed on flange 1.6 and the bowl screwed down until vane 11 engages the gage whereupon the latter may be removed.

The efficiency of a centrifugal pump of the type herein set forth is perceptibly lowered by undue roughness of the surfaces with which the water comes in contact. It may be readily seen that in a bowl constructed as described the surfaces are so exposed that any undue roughness may be readily. detected and removed, and this in conjunction with the accuracy of the spacing of the vanes materially increases the value and efficiency of the pump.

In Fig. 3 a form of bowl is shown in which the vanes 14 support a ring 23 over the upper surface of the flange 16, the said ring being cast integrally with vanes 14 in a three part mold. In this form the upper surface of flange 16 is preferably formed as indicated at 24 so as to present a substantially continuous surface to the flowing water, the fixed ring 23 partly preventing runner flange 16 from imparting a rotary motion thereto.

A still more effective form of ring 23 is shown in Fig. 4 in which the upper surface 25 thereof is cone shaped and extends upwardly a distance on tubular portion 15 of the runner thereby exposing the water to the rotary movement of saidrunner for a short distance only as it passes through openings 10.

Another feature that I have embodied in this pump is indicated at 26 and consists of a rib formed on the under surfaceof ring 18 and crosswise thereof as clearly shown in dotted lines in Fig. 2.' By placing one or more of these ribs 26 as shown I secure increased efficiency in the pump and also secure a more smoothly running and more durable pump; These improved results are secured because radially positioned vanes throw water-outwardly with greater force than angularly arranged vanes, therefore since the vanes 17 and Webs 26 are secured to the same ring a small amount of water will be forced outwardly from the under side ofring 18 with greater force than the water forced outwardly by vanes 17 on the upper surface of the ring. This being the case there is no back flow under ring 18 and no opportunity for sand, etc., to work there under to wear away the surfaces of the mem-.

bers and otherwise reduce the efliciency of the pump. It is understood of course that I do not wish. to confine myself tothe specific embodiments herein shown and described, but to include all changes in form and con struction that may be included within the scope ofthe appended claims.

I claim:

1. A centrifugal pump-including a shaft,

a plurality of runners mounted thereon, bowls operatively mounted with relation to said runners, each bowl including an upwardly extending side wall and an inwardly extending flange having an opening formed therein to permit the passage of water therethrough to the runner in said bowl, avane positioned in the shoulder formed by said wall and flange and having a height sub stantially equal to the height of said runner and extending laterally from said wall to a point adjacent said runner, and a vane depending from said flange and extending to a point adjacent the runner positioned therebelow and having a width substantially equal to the distance from the inner surface of the bowl to the opening in said flange.

2. A centrifugal pump including a shaft, a plurality of runners mounted thereon, a bearing bowl adapted to engage a discharge casing section and supporting a bearing for said shaft and adapted to engage a pump bowl, a pump bowl operatively mounted with relation to the uppermost runner and engaging said bearing bowl and having an in.- wardly extending flange provided with a central opening to permit the passage of water to said runner, a vane positioned in said bowl to receive water from said runner, a vane depending from said flange to direct water to said runner, and an annular plate connecting the lower edges of said last mentioned vanes and having a diameter substantially equal to the diameter of said runner.

3. A centrifugal pump including a shaft, a plurality of runners mounted thereon, a bearing bowl adapted to engage a discharge casing section and supporting a bearing for said shaft and adapted to engage a pump bowl, a pump howl operatively mounted with relation to the uppermost runner and engaging said be'aring bowl and having an inwardly extending flange provided with a central opening to permit the passage of water to said runner, a vane positioned in said bowl to receive water from said runner, a vane depending from said flange to direct water to said runner, and an annular plate connecting the lower edges of said last mentioned vanes and having a diameter substantially equal to the diameter of said runner, the upper surface of said annular plate sloping upwardly and inwardly toward said shaft.

4. In a centrifugal pump, a bowl including an upwardly extending side wall and an inwardly extending flange having an opening formed concentrically therein to permit the passage of water therethrough, a vane positioned in the shoulder formed by said upwardly extending wall and said flange and extending a distance laterally from said wall toward said opening, and a vane depending a distance from said flange and hav- 1 ,seeasse ing a width substantially equal to the distance from the inner surface of the bowl to the opening in said flange.

5. In a centrifugal pump, a bowl including an upwardly extending side wall and an inwardly extending flange having an open ing formed concentrically therein to permit the passage of Water therethrough, a vane positioned in the shhulder formed by said 10 upwardly extending wall and said flange and extending a distance laterally from said wall 'toward said opening, a vane depending a distance firom said flange and having a width substantially equal to the distance from the inner surface of the bowl to the opening in said flange, and an annular plate connecting the lower edges of said last mentioned vanes.

PONTUS OSTENBERG. 

